Sanyo 85464359982001 Installation Instructions Manual page 18

07-007 W-2WAY_II_NA 1/23/07
G Obtain liquid tubing size from Tables 1-9, 10, 11, 12 and 15.
Main tubing
LA = ø5/8 (ft.) (Total capacity of indoor unit is 179,400 BTU/h)
LB = ø1/2 (ft.) (Total capacity of indoor unit is 131,600 BTU/h)
LC = ø3/8 (ft.) (Total capacity of indoor unit is 83,800 BTU/h)
Distribution joint tubing
Outdoor side
Indoor side
G Obtain charge amount for each tubing size
Note that the charge amounts per 1 meter are different for each liquid tubing size.
ø5/8 (ft.) → LA
ø1/2 (ft.) → LB
ø3/8 (ft.) → LC +
Additional refrigerant charge amount is 418 oz.
CAUTION
Checking of limit density
Density limit is determined on the basis of the size of a room
using an indoor unit of minimum capacity. For instance, when
an indoor unit is used in a room (floor area 161 ft.
height 8.8 ft. = room volume 1417 ft.
shows that the minimum room volume should be 2455 ft.
2
(floor area 279 ft. ) for refrigerant of 418 oz.
<Determination by calculation>
Overall refrigerant charge amount for the air conditioner: oz
(Minimum room volume for indoor unit: ft.
418 (oz)
= = 0.29 (oz/ft.
3
1417 (ft. )
Therefore, openings such as louvers are not required for this
room.
6:09 PM Page 18
A: ø3/8 (ft.) B: ø3/8 (ft.) (from outdoor unit connection tubing)
1: ø3/8 (ft.) 2: ø3/8 (ft.)
: 131 ft. × 1.99 oz/ft.
: 16 ft. × 1.38 oz/ft.
: 225 ft. × 0.602 oz/ft. = 135 oz
A – B + 1 – 4
Be sure to check the limit density for
the room in which the indoor unit is
installed.
× ceiling
2
3
), the graph at right
3
)
3 ) < 0.3 (oz/ft. 3 )
The longest tubing length in this example
(LA = 131 ft.)
3: ø3/8 (ft.) 4: ø3/8 (ft.) (from indoor unit connection tubing)
= 261 oz
= 22 oz
Total 418 oz
3
ft.
4000
3
Range below
3500
the density limit of
3000
0.3 oz/ft.
(countermeasures
2500
not needed)
2000
1500
1000
500
0
0 200
Total amount of refrigerant
18
2
ft.
454
398
3 341
284
227
170
Range above
the density limit of
114
3
0.3 oz/ft.
57
(countermeasures
needed)
0
400 600 800 1000 1200
oz